My neighbor has a 10 year old GE model # gsd4030y70ww. dishwasher. the dishwasher won't drain. I have checked the screen in the bottom and there was no sediment. I still gave it three vinager and arm and hammer bathes with hot water.
I tried to blow through the drain from the disposal. This did not help , there must be a check valve stopping back flow.
I did not remove the dishwasher and take the drain appart from the bottom yet.
I thought maybe the pump (if it has one,)won't reverse itself. If it needs a new pump I think i'm going to recommend she buy a new one.
I'm not a repair man.
Can anyone give me an idea of what to do next?